Fuel-feed-control means for internal-combustion engines



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2 Sheets-Sheet l O. D. TREIBER Filed Sept. 13, 1927 ,y IIIIII i MIIL FUEL FEED CONTROL MEANS FOR INTERNAL COMBUSTION ENGINES May 5, 1931.

May 5, 1931. o. D. TREIBER 1,803,515

FUEL FEED CONTROL MEANS FOR INTERNAL GOMBUSTION ENGINES Filed Sept. 13, 1927 2 Sheets-Sheet 2 TT'ORNE Y WMM Patented May 5, 1193-1 UNITED sTATEz-s :PATENToFF-ICE i o'rIsD. TREIBER, oF ooLLINGswoonNEW JnRsEj, AssIGNoR 'rofrnE'IBEn DIESELN- I GINn CORPORATION, or CAMDEN, NEW JERSEY, A CORPORATION or NEWJERSEY FUELFEnncoNTRoL lunari-snortI iNfrnnNaL-ooMBns'rIoN ENGINES Application filed September 113; 1927. Serial: 219,254.

In the operation of internal combustion engines of the Diesel type in which a liquid fuel, such as oil, is employed it is desirable that the beginning` of the l discharge of fuel into the engine cylinder shall be begun at a point from 10 to 8 degrees in advance of the top dead center position of the crank shaft. It also happens that it is necessary or desirable at times to vary the amount offuel fed to the engine cylinders as by decreasingthe same when less power is required buteven in such case it is still desirable for the sake of econ- `omy in the use of fuel, if for no other reason,

that the beginning of the discharge of fuel into the cylinders of the engine structure'shall Y take place at the point above statedV with re` spect to the top dead center position offthe crank shaft.

The general object of the invention is to provide means wherebythe amount of fuelfed to the cylinder of an internal combustion engine may be varied, without changing to any substantial extentwthe point at which the initial discharge of fuelinto the engine cylinder iseffected with respect to the top dead center position of theV crank shaft. n p Italso is an object of the invention toprovidemeans of simple construction for varying the lost motion between the cam shaft `of an internal combustion engine structure and the fuel feeding means thereof and for simultaneously varying the relation of the lost motion regulating and controllingmeansfwith respect to the cams of the cam shaft and consequently with respect to the top dead center position of the crank shaft. 1 Y

Other objects and advantages of theinvention will appear in the detaileddescription thereof which follows or will become apparent from such description. *Y

In the drawings I have illustratedrvarious mechanical embodiments of the means embodying the invention and it is to be understood that the invention may be embodiedin other means than are Vshown in the drawings.

The essential purpose of the invention iste provide means whereby the' control of the amount of fuel fed into the cylinder V of an internal combustion engine may be varied jand controlled without varying substantially -`the initial point of discharge with respect to Athe top dead center position of the crank shaft.`

enlarged so as to indicate more clearly the` structure. thereof;

Fig. 3 is a view simi-lar to that shown in Fig. 2 illustrating a modied construction vof means embodyingthe invention; Fig'. 4: is a view in sectional elevation take on the line 4 4 of Fig. 3;

Fig. 5 is a view similar to thatof Figs. 2 and 3 but showing still another modified construction of means embodying the invention;

Fig.v 6 is a vertical sectional view of the upper portion o f an internal combustion engine structure showing a modified construvtion of fuel feed controlling means; and

Fig. 7 is a view similar 4to that Vshown in ,ligl but showing Va modified construction of feed controlling means embodying theinvention k Y In the drawings I have shown a crank casing l, a crank shaft 2, an engine cylinder 3, a cylinder head 1, a piston 5 adaptedto reciprocate in the cylinder 3 and a piston rod 6 connecting the piston with the crank arms ofthe crank shaft 2. Y Y

In4 the constructionv as illustrated liquid fuel is discharged froml spray nozzles 7 (there lbeing one spray nozzle for each engine cylinder), such fuel being supplied vto vthe said spraynozzlest-hrough vpipes 8 having connection with afsupply of liquid fuel (not shown) under constant pressure. 1 Y

A gear 10 is mounted upon the crank-shaft 2 andis in engagement with agear 11 mounted yupon and rigidly connected with'a cam shaft i 1g. 1 is a view in transverse vertical secloo of fuel into the engine cylinders. In the several forms of construction the connections between the cam shaft and the feeding means, whether it be a spray nozzle or a pump for forcing fuel into the engine cylinders, comprise or include lost motion means and it is to the latter means that the invention relates. The gears 10 and 11 are employed for operating the cam shafts shown in the several forms of construction illustrated in Figs. 1 to 5 inclusive.

In Figs. l and 2 I have provided a link 2O pivotally connected at its outer end to the upper end of an arm 21 secured to a shaft 22 which may be manually rotated by means 0f a handle-.23 which is located in adjoining relation to a quadrant 24 having teeth ,25 upon the convex edge with which a spring pressed catch 27 is adapted to .engage to hold the handle in any position or to which it may be adjusted, the arm 21 being likewise, in `consequence, held in its .corresponding adjusted losition The shaft 22 is journaled in bearings provided in the upper ends of brackets 28 supported upon a stationary portion 2S) of the frame of the structure upon which also the quadrant 24 is supported. The inner end of the link 20 is provided with a roller .3() which is adapted :to .contact with the cam disk 13 and the ycam projection 14. The said link 20 terminates in an upwardly projecting portion 31, the surface 32 of which is inclined as shown and extends upwardly in a direction away from a vertical line through the axis of the shaft 12 orin an outward direction. rIhe surface 32 usually is spaced from and is adapted to contact with the lower end of an actuating rod 33. The lower end of the said rod is guided by means of a bearing guide 34 supported in any suitable manner upon a stationary part of the frame of the Iengine structure. The upper end of the rod 33, in the construction shown, is .connected with the outer end of a lever 35 pivoted at its .opposite end to the upper end lof a bracket 36 supported upon the upper side of the .cylinder head 4. The said lever 35 is connected inter.- mediate its ends as shown at 37 to the upper .end of a rod 38 which is adapted to be lifted upon upward movement of the rod 33 and lever 35 to open a valve (not shown) at .the lower end of the spray nozzle 7.

In the case of a -multi-cylinder struct-ure it will be understood that lost motion feed Ycontrolling means such as described is associ-ated with each cylinder.

It will be apparent that by adjusting the link 2O and the surface 32 the projecting portion 31 inwardly or ,outwardly so as to vary the lost motion of the feed operating and controlling means, the period during which the feeding of fuel is effected at each operation may be varied but notwithstanding such variation it is desirable, as has been previously pointed out, that the point with re- "ffii spect to the top dead center position of the crank shaft at which the discharge of fuel begins at each feeding operation shall remain substantially unchanged. If it be desired to decrease the amount of fuel supplied to the engine cylinder or cylinders the link 2O should be adjusted outwardly or toward the right, having reference to Figs. l and 2 of the drawings. Such an adjustment increases, as is obvious, the amount of lost motion between the surface 32 and the adjoining end of the actuating rod 33. At the same time the roller 30 is moved in a direction opposite that of the rotation of the cam disk 13 and cam projection 14 thereon so that the latter contacts with the roller 3() at an earlier point or moment in its rotation and at an earlier point in the rotation Vof the crank shaft with respect to its top dead center position. It follows, therefore, that a certain portion of the surof .the cam projection 14 passes underneath and in Contact with the roller 30 before .the surface 32 of the projection 31 .contacts with the lower adjoining end of the rod 33. The parts are so constructed and related to each other that at the moment of contact and elevation of the rod 33 to actuate the lever 35 to open the valve of the spray nozzle 7 or to actuate any other feeding means the crank shaft has arrived at a position 10 to 8 degrees, as may be elected, in advance of its top dead .center position. The initial feeding of the fuel is thus given at the point desired. A portion of the surface of the cam projection 14 having already passed underneath and in contact with the roller 3() and a portion only of the `remaining surface thereof being effective to cause elevation of the rod 33, it follows that the latter is held in elevated position for a short period of time, thereby reducing the quant-ity of fuel fed into the engine cylinder or cylinders. If, however, the link 2() be adjusted in the opposite direction so as to decrease the amount of lost motion between the surface 32 and the adjoining lower end of the actuating rod 33, a reverse result is 'brought about; that is, the actuating rod 33 is held in elevated position by the cam projection 14 for a long period but the latter contacts with the roller`30 at a later period 1n its rotation whereby the initial feeding action i-s effected at substantially the same position with respect to the top dead center position of the crank shaft.

In Figs. 3 to 5 inclusive I have shown modiiications of the structure in which .the parts ie, 1e, iaeaea, 24,25%2128, 29 and aa are identical with the parts correspondingly designated `in Figs. 1 and 2 of the drawings.

In Figs. 3 and 4 I have provided a link 40 pivoted at its outer end to the upper end of an -arm 4l rigidly mounted upon the oscillatable shaft 22, which shaft is adapted to be oscillated or actuated by the handle 23. At its inner end the link 40 is provided with a reoasis roller 43 (corresponding to the rolleri30 in Figs. 1 and 2) and is also provided with an upwardly extending projection 44, which may be referred to as an actuator, between the upper end of which and the lower adjoining end of the rod 33 a wedge shaped member 45 is located. The wedge 45 is pivotally connected at its outer end to the upper end of an arm 46 mounted upon the oscillatable or rock shaft 22. Upon oscillating or rocking the shaft 22 the arms 41 and'46 are likewiseoscillated or rocked. Upon the rocking of the said arms 41 and 46 outwardly the links 40 and 45 are moved outwardly or if the said arms are oscillated or rocked in the opposite direction the said links 40 and 45 are moved inwardly. The operation of the link 40 and wedge 45 in their control of the feeding of fuel to the engine cylinder or cylinders is identical with the operation as described in connection with shaft 22. At its inner end'the link50 is pro- A vided with a roller 53 which rests upon the cam disk 13 and is actuated by the cam projection 14 which contacts therewith. The link is also provided at its inner end with an upwardly extending projection 54 which may be referred to as an actuator between the upper end of which and the lower end of the actuatingrod 33 a wedge 55 is located, which wedge is pivoted at its outer end to anv arm 56 secured to the rock shaft 22. rIhe operation of the link 50 and the wedge 55 to control the Vfuel feeding operation is identical with the similar operations of the corresponding mechanisms illustrated in Figs. 1 and V2 and?) and 4.

In Fig. 6 I have shown a construction in which the feed control mechanism corresponding to the similar mechanism previously described and illustrated in Figs. 1 to 5 of the drawings is located at the upper part of the engine structure. VIn said Fig. 6 I

. have shown a cam shaft 59 journaled in brackets, only one of which is shown at 60, which cam shaft is provided with cam disks, only one of which is shown at 61, having cam projections 62 thereon which co-operate with a roller 63 upon the lower adjoining end portion of a link 64 pivoted upon an eccentric,

with the teeth 7 0 holds the handle 68 together with the shaft 66 in any position to whichthe same may be adjusted. The quadrant 69 is supported upon arms 72 which project from one of the brackets 67. An arm 73 is secured at its outer end to the rock shaft 66 and is adapted to be rocked or oscillated by!" tends inwardly and is connectedto the rod 38 to actuatethe same to effect opening of the valve (not shown) at the lower end of the spray nozzle 7. The bell crank lever comprising the arms 78 and 79 is pivoted upon a rod 80 supported upon the brackets 67.

It will be understood that a lost motion feed control mechanism such as is illustrated by the parts 61, 62, 63, 64, 73, 75, 76, 77, 78, 79 and 80 is associated with each cylinder of a multi-cylinder engine structure.

In Fig. 7 I have shown a construction com` prising a cam shaft 59, brackets 60 and cam discs 61 having cam projections 62 similar to the corresponding parts shown in Fig. 6 of the drawings.

In the construction as illustrated in this figure of the drawings I have provided a series of angular levers pivotally mounted upon a rock shaft, one end of each of which levers is connected with a fuel feeding means for actuating the same, while the opposite end thereof is adapted to be acted upon directly by cams mounted upon a revoluble cam shaft and have also provided the last Vmentioned end of each of said levers with adjustable means so related to the cams withV which they are respec-tively associated that upon adjustment thereof with respect to the said cams variation of the feeding of fuel may be affected.V

A roller mounted upon the lower end of an adjustable arm or support 86 is held in co-operative relation with respect to the rotating cam disk 61 and is adapted to Contact with and to be actuated by the cam projection 62 thereon. The support 86 `for the roller 85 .is slidably mounted upon the outwardly and downwardly extending arm 87 of an angular lever 88, the other or opposite arm 89 of which is connected with the rod 38 to actuate the same to control the valve of the spraynozlzle 7. The angular arm 88 is pivoted upon a rock'shaft 90 journaled in brackets, only .one

of which is indicated at 91. The shaft 90 is adapted to be rocked by means of a handle 92V ysecured to one end thereof, which handle projects in co-operative relation to a quadrant 93 (supported in any suitable manner upon a stationary part of the engine structure) the convex edge of which is provided with teeth 94 which are adapted to be engaged by means of a spring pressed catch 95. The arm 8G is mounted within a suitable slot 96 provided in the upper outer side of the arm 87 and is provided with a projection 97 to the upper end of which the outer end of a. link 9S is pivotally connected, the opposite end of which is pivotally connected to the ripper end of an arm 99 secured to the rock shaft 90 previously referred to. lt will be apparent that upon rocking of the rock shaft 90 the arm 99 is likewise rocked, as a result of which the supporting arm o6 is adjusted in one direction or the other (depending upon the direction of the rocking movement) so as to vary the position of the roller S5 with respect to the cam disk 6l. It will be understood that the cam shaft 59 and the cam disk or cam disks thereon rotate in an anti-clockwise direction. If the arm 86 be adjusted outwardly the result is that the cam projection (i2 contacts with the roller 85 at a slightly later point in its revolution and in consequence of which the roller is held depressed for a shorter period resulting in shorter periods of fuel feed at each revolution of the cam shaft, lf, on the other hand, the supporting arm SG should he adjusted in the opposite direction or toward the axis of the rock shaft 90, the roller 85 is adjusted'into a position such that' the cam projection 62 contacts therewith at an earlier point or movement m its revolution, in consequence of which the periods during which the roller. Se held depressed are increased resulting 1n increased fuel feed at each fuel discharging operation. Upon reference to Fig. 7 it will be apparent that when the supporting arm 1s adjusted inwardly the distance between the axes of the roller 85 and cam 6l is increased whereas if adjustment is outward the distance is decreased.

lt will be understood that the feeding con trollingl mechanism illustrated in Fig. i" is duplicated for each cylinder of a multi-cylinder engine structure.

It will be understooo that the cani shafts 59 of the constructions illustrated in Figs. (3 and T are operated by means of ge r trains between the crank shaft and the said cam shaft.

lt will be seen that by my invention l have provided simple means easily controlled and regulated for controlling and Tegulatmg he feeding of fuel into the cylinders of internal combustion engines, whether the said control be employed for opening the valve of spray nozzles as illustrated or for controlling the operation of pumps by means of which fuel is forced into the engine cylinders.

Having thus described my invention., what I claim and desire to secure by Letters Patent is:

l. In mechanism for controlling the means for feeding fuel into the cylinder of an internal combustion engine, the combination of a cam shaft having a cam thereon, rotation of the said cam shaft being effected by the crank shaft of the engine, an actuating rod interposed between the Vfuel feeding means and the said cam shaft, means adapted to be actuated by the cam upon said cam shaft for actuating the said rod, the said last mentioned means being spaced from the said rod, adjustable means interposed between the said means and the said rod whereby the lost motion space between the said means and the said rod may be varied, and means for adjustin@V the said cam actuated means tangentially of the said cam simultaneously with the adjustment of the said adjustable lost motion controlling means.

2. In mechanism for controlling the operation of the fuel feeding device of an internal combustion engine, the combination of a cam shaft adapted to be rotated from the crank shaft of the engine, which cam shaft is pro vided with a cam disk having a cam projectien thereon, an actuating rod having connection with the fuel feeding means, an actuator for the said actuating rod, which actuator is adapted to be actuated by the said cam projection and the said actuator being spaced from the adjoining end of said rod, adjustable means interposed between the said actuator and the said actuating rod for varying the lost motion space therebetween, and means for adjusting the said actuator in the plane of said disk and transversely of the axis of rotation thereof, simultaneously with the adjusting of the said interposed lost motion'controlling means for varying the position of the said actuator with respect to the circumference of the said cam disk.

3. In mechanism for controlling the operation of the fuel feeding means of an internal combustion engine, the combination of a cam shaft adapted to be rotated by means interposed between it and the crank shaft of the engine, which cam shaft is provided with a disk having a cam projection thereon, a device having connection with the said fuel feeding means, a portion of which device is located in cooperative spaced relation to the said cam disk and the said cam projection thereon, a pivotally supported actuator interposed between the said cam disk and the cam projection thereon and the said device, said actuator being spaced from the said device to provide lost motion, adjustable means interposed between the said actuator and the said device for controlling the amount of lest motion, and means for adjusting the said actuator transversely of the axis of the said cam disk and in the plane thereof to vary its position with respect to the periphery of said disk.

4l. In mechanism for controlling the operation of the liquid fuel feeding means of an internal combustion engine, the combination cam disk and the adjoining portion of the said device and spaced from the latter, the surface of the said actuator. adjoining the said device being beveled outwardly, and means for adjust-ing the said actuator transversely of the axis of the said cam disk to vary its position with respect to theV latter and with respect to the adjoining portion of said device.

5. In mechanism for controlling the feeding operation of means for feeding liquid fuel to the cylinder of an internal combustion engine, the combination of a cam shaft having a cam disk thereon provided with a cam projection, rotation of which shaft is effected by means interposed between it and the engine crank shaft, a device interposed between the liquid fuel feeding means and the said cam disk and being'spaceol from the latter, a rock shaft, an arm mounted thereon,

a link having pivotal connection at its outer end to the said arm, the inner end of said link being interposed between the said cam disk and the saiddevice and spaced from the latter, the said inner end of the said link having an inclined surface vwhereby upon the rocking of the said arm to effect movement of the said link relatively to the said cam disk and the said device the width of the space between the one end of said link and the adjoining portion of said device is varied, the position of the inner end of said link with respect to the periphery of the said cam disk being simultaneously varied.

6. Inmechanism for controlling the operation of the liquid fuel feeding means of an internal combustion engine, the 'combination of a cam shaft having a cam disk provided with a cam projection, rotation of the said cam shaft being effected by means interposed between it and the crank shaft of the engine, a device interposed between the said fuel feeding means and the said cam disk, the said device 'being operatively related at one end to the said fuel feeding means and at its opposite end being spaced from thev said cam disk and the cam projection thereon, a rock shaft having a laterally projecting arm rigidly connected therewith, means for effecting rocking movement of said shaft and of the said arm, and a link having pivotal connection at its outer end with the said arm, the inner end of said link resting Vupon the said cam disk and being provided with a projection extending transversely of the axis of the said disk, which projection is provided upon its outer end with a surface which is inclined upwardly from its inner end, which surface is normally in spaced relation to the adjoining portion of the said device.

'7. In mechanism for controlling the operation of the liquid fuel feeding means of an internal combustion engine, the combination of a rotating cam shaft having a cam located thereon, operative connections between said cam shaft and the fuel feeding means for actuating the latter, said connections including a lost motion varying device located intermediate of and in spaced relation to other portions thereof, and means for simultaneously .adjusting said device and a co-operating portion of said connections.

8. In mechanism for controlling the operation of the fuel feeding means for an internal combustion engine, the combination of a cam shaft having a cam disk mounted thereon, an actuating rod connected to the said fuel feeding means, an actuator interposed between the cam disk and one end of said rod, said actuator having means thereon located in spaced relation to the said actuating rod to provided a lost motion connection therewith, a cam roller connected to said actuator and movable therewith, and means common to the said means and said actuator for adjusting both simultaneously, the said actuator being adjusted tangentially of the said cam disk.

9. -In mechanism for controlling the operation of the fuel feeding means of an internal combustion engine, the combination of a cam shaft having a cam thereon, which shaft is adapted to be rotated by the crank shaft of the engine, a member having connection with the fuel `feeding means, a member with which the said cam is .adapted to contact, a lost motion regulating means interposed between the said members, and means for simultaneously adjusting the said second named member and the said lost motion regulating means, the adjustment of the latter being in the plane of the said cam and transversely of the first named member.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 31st day of August, A. D. 1927.

' OTIS D. TREIBER. 

